Majority rule wasn't tried for by the constitution. (Actually scared the crap out of many founders.)

2 senators per state regardless of populationA senator can block legislation.Electoral Congress ignores popular votes.2/3rd requirement ignore the majority.

The one bit of allocation of house districts by count is controlled by gerrymandering.

It is interesting to note that a former constitutional professor in the White House doesn't understand separation of power. Actually, the founders designed it to be a difficult, contentious process. In that regard, things are working great.